Never could throw fast but I was good a predicting my MPH at fairs and carnivals when they would have the game where you would throw a ball then predict the next one. What ever the first throw was I would add 2 mph to the next. I had a stack of team helmets.
Back-in-the-day, I threw on average around 80mph. I once threw a no-hitter in high school, but I hit 7 batters in the game and along with 2 errors, the other team scored 2 runs one inning.
That was my problem. I was very wild and used to average hitting around 3 batters per game